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arXiv 2103.05329cs.NI
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FIND:一种基于SDR的室内精细定位工具

FIND: an SDR-based Tool for Fine Indoor Localization

Evgeny Khorov, Aleksey Kureev, Vladislav Molodtsov

摘要:

室内定位方法使用Wi-Fi接入点(AP)来估计WiFi信号的到达方向(DoA)。本文演示了FIND,这是一种基于软件定义无线电的室内精细定位工具,它使用四个天线接收80 MHz频段的Wi-Fi帧。据我们所知,这是有史以来第一个从频域和时域中提取此类帧数据以实时计算Wi-Fi信号DoA的原型。除了其他的原型,我们检索帧的综合信息,可用于DoA估计:在时域中的所有前导字段,信道状态信息,和信噪比。使用我们的设备,我们收集了一个数据集,用于比较在同一场景中估计到达角的不同算法。此外,我们提出了一种新的校准方法,消除了恒定的接收路径之间的相移所造成的硬件缺陷。提供了所有校准数据以及在消声室和教室中收集的具有各种DoA的数据集,以促进密集部署中室内定位,智能表面和多用户传输领域的进一步研究。

英文摘要:

An indoor localization approach uses Wi-Fi Access Points (APs) to estimate the Direction of Arrival (DoA) of the WiFi signals. This paper demonstrates FIND, a tool for Fine INDoor localization based on a software-defined radio, which receives Wi-Fi frames in the 80 MHz band with four antennas. To the best of our knowledge, it is the first-ever prototype that extracts from such frames data in both frequency and time domains to calculate the DoA of Wi-Fi signals in real-time. Apart from other prototypes, we retrieve from frames comprehensive information that could be used to DoA estimation: all preamble fields in the time domain, Channels State Information, and signal-to-noise ratio. Using our device, we collect a dataset for comparing different algorithms estimating the angle of arrival in the same scenario. Furthermore, we propose a novel calibration method, eliminating the constant phase shift between receiving paths caused by hardware imperfections. All calibration data, as well as a gathered dataset with various DoA in an anechoic chamber and in a classroom, are provided to facilitate further research in the area of indoor localization, intelligence surfaces, and multi-user transmissions in dense deployments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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